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TMtxExpression.DefineMatrix Method ([In] string, [In] TMtx)
TMtxExpression Class  TMtxExpression Members  Dew.Math Namespace  DefineMatrix Method  Example  See Also
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DefineMatrix defines new matrix variable.

Syntax
C#
Visual Basic
public TMatrixValue DefineMatrix([In] string AVarName, [In] TMtx mtx);
Remarks

If variable with name AVarName already was definded, it will be redefined and all expressions which contain the symbol AVarName will be recompiled before the next evaluation. External matrix may be assigned as values holder. If external matrix is not assigned, internal matrix will be used.

See Also
Example

Use parser to evaluate the "A+2*B" formula where A=(2,1; 3, 0) B=(1,0; 1,1) are 2x2 matrices. 

 

using Dew.Math; using Dew.Math.Units; namespace Dew.Examples() { void Example(TMtxExpression MyParser) { // 1. Define variables TMatrixValue A = MyParser.DefineMatrix("A"); TMatrixValue B = MyParser.DefineDouble("B"); // 2. Set values A.Value.SetIt(2,2, false,new double[] {2,1,3,0}); B.Value.SetIt(2,2, false,new double[] {1,0,1,1}); // 3. Add formula and evaluate, MyParser.AddExpr("A+2*B"); Matrix res = new Matrix(false,0,0) res = MyParser.EvaluateMatrix; // res = (4,1; 5,2) } }
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